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A Beginner's Tutorial for Understanding Templated User Controls

, 6 Jun 2012 CPOL
Understanding templated web user controls from a beginner's perspective.
templatedUserControlTest.zip
templatedUserControlTest
App_Code
App_Data
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.ComponentModel;

public partial class TemplateUCtrl : System.Web.UI.UserControl 
{
    //the template control specific stuff
    private ITemplate personTemplate;
 
    //the controls data specific stuff
    private PersonItem personItem = null;

    protected void Page_Init(object sender, EventArgs e)
    {
        //lets first clear the placeholders to attach then to new data
        this.phdPerson.Controls.Clear();     

        //but what if the user forgot to send the user information   
        if (Person == null)
        {  
            phdPerson.Controls.Add(new LiteralControl("Please attach the control with a person object."));         
        }
        else
        {
            //check if the templates are null we want to use simple literal
            //The user wants the default representation of the control
            if (PersonTemplate == null)
            {
                //Lets show the default representation of the control
                phdPerson.Controls.Add(new LiteralControl("<Strong>First Name: </strong>"));
                phdPerson.Controls.Add(new LiteralControl(Person.FirstName));
                phdPerson.Controls.Add(new LiteralControl("<br/>"));
                phdPerson.Controls.Add(new LiteralControl("<Strong>Last Name: </strong>"));
                phdPerson.Controls.Add(new LiteralControl(Person.LastName));
                phdPerson.Controls.Add(new LiteralControl("<br/>"));
                phdPerson.Controls.Add(new LiteralControl("<Strong>Age: </strong>"));
                phdPerson.Controls.Add(new LiteralControl(Person.Age.ToString()));
            }
            else
            {
                PersonItemContainer container = new PersonItemContainer(this.Person);
                this.PersonTemplate.InstantiateIn(container);
                phdPerson.Controls.Add(container);
            }
        }
    }

    [PersistenceMode(PersistenceMode.InnerProperty)]
    [TemplateContainer(typeof(PersonItemContainer))]
    public ITemplate PersonTemplate
    {
        get
        {
            return personTemplate;
        }
        set
        {
            personTemplate = value;
        }
    }

    public PersonItem Person
    {
        get
        {
            return personItem;
        }
        set
        {
            personItem = value;
        }
    }    
}

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Rahul Rajat Singh
Software Developer (Senior)
India India
I Started my Programming career with C++. Later got a chance to develop Windows Form applications using C#. Currently using C#, ASP.NET & ASP.NET MVC to create Information Systems, e-commerce/e-governance Portals and Data driven websites.

My interests involves Programming, Website development and Learning/Teaching subjects related to Computer Science/Information Systems. IMO, C# is the best programming language and I love working with C# and other Microsoft Technologies.
  • Microsoft Certified Technology Specialist (MCTS): Web Applications Development with Microsoft .NET Framework 4
  • Microsoft Certified Technology Specialist (MCTS): Accessing Data with Microsoft .NET Framework 4
  • Microsoft Certified Technology Specialist (MCTS): Windows Communication Foundation Development with Microsoft .NET Framework 4
 
If you like my articles, please visit my website for more: www.rahulrajatsingh.com[^]
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Web03 | 2.8.1411028.1 | Last Updated 6 Jun 2012
Article Copyright 2012 by Rahul Rajat Singh
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